I don't know anyone who channel surfs anymore. A growing number don't even have cable/dish--myself included. Pretty much all of them that still do watch TV by DVR. They already know what they want to watch at any given time.
These days, I don't think Babylon 5 randomly appearing on television stations will bring any significant amount of new fans... Streaming sites seem like a better route to me too, but I do see the difficulties with that.